Statistics Chapter 1- Test 1

32 cards

Statistics. Understandable Statistics


 
  
Created Sep 22, 2011
by
mandystanley

 

 
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1
A descriptive measure of a sample
 
statistic
2
method of organizing, summarizing, and presenting data
 
descriptive statistics
3
The group of all items of interest
 
population
4
the process of making an estimate. prediction, or decision about a population based on sample...
 
statistical inference
5
a set of data drawn from a population
 
sample
6
the data can be arranged in order & differences b/w data values are meaningful
 
interval scale
7
the data consists of names, labels, or categories. There are no criteria for ordering the data...
 
nominal scale
8
the data can be arranged in order & both & ratios b/w data values are meaningful. Also...
 
ratio scale
9
the data can be arranged in order. However, differences b/w data values either can;t be determined...
 
ordinal scale
10
The Requirements of a Random Sample
 
1. Each indiv. in population of interest must have an equal probability of being of being included...
11

Divide the entire...

 
Cluster sampling
12

Create a sample by...

 
Convenience Sampling
13

A simple random sample...

 
Simple Random Sampling
14

Divide the entire...

 
Stratified Sample
15

Number all members...

 
Systematic sampling
16

A variable that describes...

 
Qualitative variable
17

A quantitative variable...

 
Quantitative variable
18

numerical measure...

 
Parameter
19
Given a random sample of 9 skiers at Vail:18, 25, 32,16, 41, 52, 29, 58, 23Give the 5 number...
 
XMin= 16;  Q1= 20.5;  Med (Q2)= 29;  Q3= 46.5;  Xmax=58 Age of skiers
20
What is IQR and how do you find it?
 
Interquartile RangeQ3-Q1= 20.5
21
How do you find the sample mean?
 
Summation of X divided by n
22
How do you find the median?
 
Order the data and then find the physical middle; Position= (n+1)/2
23
How do you find the mode?
 
it is the most frequent
24
How to find Weighted Mean
 
Summation (Weight x Data) / Summation(Weight)
25
How do you find the Range?
 
Xmax - Xmin
26
How do you find the sample mean?
 
Summation(X) / n
27
How do you find the sample standard deviation?
 
fill in
28
Computational Formula (Standard Deviation)
 
fill in
29
Population Standard Deviation
 
fill in
30
Sample Variance
 
fill in
31
Population Variance
 
fill
32
Sample Mean for Grouped Data
 
fill

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